Reweighted lp Constraint LMS-Based Adaptive Sparse Channel Estimation for Cooperative Communication System.pdf (3.6 MB)
Reweighted lp Constraint LMS-Based Adaptive Sparse Channel Estimation for Cooperative Communication System
journal contribution
posted on 2022-03-28, 15:31 authored by Aihua Zhang, Pengcheng Liu, Bing Ning, Qiyu ZhouThis paper studies the issue of sparsity adaptive channel reconstruction in time-varying cooperative communication networks through the amplify-and-forward transmission scheme. A new sparsity adaptive system identification method is proposed, namely reweighted ππ norm (π < π < π) penalized least mean squareοΌLMSοΌalgorithm. The main idea of the algorithm is to add a ππ norm penalty of sparsity into the cost function of the LMS algorithm. By doing so, the weight factor becomes a balance parameter of the associated ππ norm adaptive sparse system identification. Subsequently, the steady state of the coefficient misalignment vector is derived theoretically, with a performance upper bounds provided which serve as a sufficient condition for the LMS channel estimation of the precise reweighted ππ norm. With the upper bounds, we prove that the ππ (π < π < π ) norm sparsity inducing cost function is superior to the reweighted ππ norm. An optimal selection of π for the ππ norm problem is studied to recover various π
sparse channel vectors. Several experiments verify that the simulation results agree well with the theoretical analysis, and thus demonstrate that the proposed algorithm has a better convergence speed and better steady state behavior than other LMS algorithms.
History
Published in
IET CommunicationsPublisher
Institution of Engineering and TechnologyVersion
- AM (Accepted Manuscript)
Citation
Zhang, A., Liu, P., Ning, B. and Zhou, Q. (2019) 'Reweighted lp Constraint LMS-Based Adaptive Sparse Channel Estimation for Cooperative Communication System'. DOI: 10.1049/iet-com.2018.6186.Electronic ISSN
1751-8636Cardiff Met Affiliation
- Cardiff School of Technologies
Cardiff Met Authors
Pengcheng LiuCopyright Holder
- Β© The Publisher
Language
- en